I had the same rifle you have. I love the Accumark, but I just couldn't afford to feed that thing (was still in school at the time). You should be able to shave about $25 off that price if you shop a little.
I've had the Accumark in 30-378, 300 Win Mag., and a SVM in 22-250. All were good shooters, but I never was happy until I found my baby...A Jap-made Fibermark with the McMillan stock in 270WBY mag. Howa really put this baby together well and the blueing is beautiful.
Anyway, I envy that Accumark. I think one in 257WBY would be sweet. You're not going to find many MK V fans around here, so go shoot some tight groups and come back and show the nay-sayers. [img]/ubbthreads/images/graemlins/grin.gif[/img]